Improvement of hydrometallurgical processes of refining of silver and production of metal powders on silver base

Abstract

Purpose: development of theoretical bases of improvement of the silver electrolytic refining process and production of silver powders and alloys by chemical methods. The work substantiates for the first time principles of selection of the production medium for silver refining, describes the performed complex thermodynamic and kinetic investigations of the anodic dissolution and cathode reduction of silver in perchlorate media and production of metallic silver powders and alloys in the presence of surface-active substances. The results of the work include the development of the silver electrolytic refining process in perchlorate media which provides for high technical and economic characteristics and ecological cleanness of the process. The developments also include the process of production of a silver powder possessing the prescribed physico-chemical properties by reduction in the presence of the surface-active substances and the process of production of silver powders and alloys with zinc under the conditions of a self-propagating reaction. The developed processes have undergone large-scale tests. The quality of the silver powders and alloys has increased and the technical and economic characteristics and the ecological cleanness have been improvedAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio